| iterms | R Documentation | 
Create a vector of interaction terms for linear and logistic regression
iterms(vars, nway = 2, sep = ":")
| vars | Labels to use | 
| nway | 2-way (2) or 3-way (3) interaction labels to create | 
| sep | Separator to use between variable names (e.g., :) | 
Character vector of interaction term labels
paste0("var", 1:3) %>% iterms(2)
paste0("var", 1:3) %>% iterms(3)
paste0("var", 1:3) %>% iterms(2, sep = ".")
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